Bit-brace.



PATENTED NOV. 7, 1905.

H. J. COOK.A

BIT BRAGE.

APPLIGATION FILED SEPT. z2, 1904.

2 SHEETS-SHEET 1.

No. 803,669. A PATBNTED NOV. '7, 1905. H. J. COOK.

BIT BRAGE.

APPLIOATION FILED SEPT. 2z. 1904.

z SHEETS-SHEET z.

$6 al @J6/Colman. dm3/www1 "UNITED STATES l PATENT OFFICE.

HARRIS J. COOK, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO STANLEY RULE &LEVEL COMPANY, OF NEW BRITAIN, CONNECTICUT, A COR- PORATION OFCONNECTICUT.

BIT-BRACE- Specification of Letters Patent.

Patented Nov. '7, 1905.

Application filed September 22, 1904. Serial No. 225,435.

T LZZ whom, t weary concern:

Be it known that I. HARRIS J. COOK, acitizen of the United States.residing at New Britain, in the county of Hartford, State ofConnecticut, have invented certain new and useful Improvements inBit-Braces, of which thefollowingis afull, clear, and exact description.

My invention relates to improvements in IO bit-braces and similar tools.

The object of the invention is to provide simple and effective meanswherebya drivingy part may be coupled with a driven part so that thelatter may be rotated with and by the- I5 former irrespective of thedirection of rotation and whereby the driving part may be coupled tothe'driven part so that the latter will be driven by the former ineither direction, said parts rotating lfreely in an opposite 2Odirection.

In the accompanying drawings, Figure 1 is aside elevation of myinvention as applied to a bit-brace, although it is by no meansconiineol to this specific use. Fig. 2 is a side elez 5 vation of thedriving part detached. Fig. 3

is a view of the lower side of the part illustrated in Fig. 2. Fig. 4:is a plan view of the driven part detached. Fig` 5 is a plan View of adetail. Fig. 6 is a section on the line w 3o w, Fig. 5. Fig. 7 is a sideelevation, partly in section, of the several parts of the clutchmechanism, the latter being in a position wherein the driving and drivenparts are interlocked against independent rotation. Fig.

3 5 8 is a similar view, the clutch mechanism being shown in a positionwherein the driving part will be interlocked with the driven part onlywhen the former is rotated clockwise. Fig. 9 is a similar view, theclutch mechanl4o ism being shown in a position wherein the driving partwill be interlocked with the driven part only when the former is rotatedin a reverse direction. Fig. 10 is a section on the line of Fig. 7. Fig.11 is asection on the line y y of Fig. 8. Fig. 12 is asection on theline 2 .a of Fig. 9. Fig. 13 is a development of the controlling-sleeve,showing the inner side thereof. Fig. 14 is a perspective Viewillustrative of the driving part and the associated clutch-pieces, saidparts being inverted, although in the same position as shown in Fig. 9.

1 is a driving part.`

2 is the driven part.

3 is the controlling-sleeve. 55

4: is a raceway in a driven part in which may be locatedantifriction-balls 5, upon which the hub 6 of the driving part may bear,Whereby pressure applied to the driving part toward the driven part willimpart the least possible resistance.

71 is a spindle on the driven part, the said spindle passing through thedriving part and held by a screw 71L or equivalent means. The middleportion of the hub 6 of the driving 65 part is provided withlongitudinal grooves 8 8, in which movable pieces 7 7, which I will termherein "spacers or blockingout devices,are located. These spacers arebest seen in Figs. 7 to 12, inclusive. The opposite sides of the lowerend of the hub 6 are cut away to form double cam-surfaces 10 10, thelowest point of these cam-surfaces being midway between two of thelongitudinal grooves 8 8. Within the space between these carn- 75surfaces and the annular wall 2Loil the driven part 2 are locatedrollers l1 11. In the drawings I have shown two sets of rollers; butobviously the number of sets employed is immaterial. Between theserollers is located suitable means to normally press them apart so as tocause the same to wedge between the higher parts of the cam-surfaces 1010 and the surrounding annular wall 2 of the driven part. (See, forexample, Figs. 7 and 10.) The 85 particular means to press these rollersapart so that they will wedge is immaterial, although in the preferredform it comprises a spring 12, carrying at each end a plate 13 13, whichbear iiatwise against the adjacent sides of two of said rollers. Thenormal tendency of the spring is to cause the roller at each end thereofto wedge between the annular wall of the driven part and thecam-surfaces 10 10, whereby if the driven part is rotated in either di-95 rection the driven part will be clutched and independent rotationprevented.

From the foregoing it will be seen that when the several parts of theclutch mechanism are in the position shown in Figs. 7 and 10 the IOOdriving and driven parts will be'interlocked. Should the spacer 7 beshifted from the position shown in Figs. 7 and 10 to that shown in Figs.8 and 11, the adjacent roll 11 Will be moved down the cam-surface untilit is held free of the annular wall 2 or' the driven member, in whichposition the driving part may be rotated in a left-hand direction freelywithout moving the driven part, but will clutch the latter when rotatedin the right-hand direction. Should the spacers 7 7 assume 'the positionshown in Figs. 9 and 12, thereverse Will be true. The means for shiftingthe spacers 7 7 comprises'a controlling-sleeveM, having on its innersurface a cam-groove 14a. (See Figs. 5, 6, and 13.) Upon the upper endsof the spacers 7 7xl are outward projections which extend into thegroove 14a. When the controlling-sleeve is in the position indicated inFigs. 7 and l0, the cam-groove will hold the spacers away from theclutch-rolls. By rotating the controlling member 14. in one directionone of the spacers will be moved to disengage one of the clutch-rolls.By reversing the controlling member the opposite clutch-roll will bedisengaged. When the member 14 is at the middle point, both rolls willbe disengaged, as shown in Fig. 7.

To facilitate the entrance of the ends of the spacers 7 7 to the rear oftheir respective rolls, the ends thereof may be slightly tapered, asshown in Figs. 7 to 9.

15 isa stop on the driven part which projects into a groove 16 in thecontrolling member 14 for the purpose of limiting the rotative movementoi' the latter.

17 17 17 are notches on the controlling member, which may be useful inindicating to the user the three positions of said controlling member.

I am aware that ratchet devices have been employed whereby the drivingand driven parts may be locked together and whereby they may be free torevolve independently in one direction and be locked in an oppositedirection; but in such devices there is always more or less lost motion,depending upon the number oi' teeth employed. By my invention theratchet mechanism is dispensed With and the user is able to securepositive action and an instantaneous response on the part of the drivenmember when the driving part is turned in the direction to cause theclutchrolls to engage.

It should be understood that I have illustrated and described only thepreferred form of my invention, which it is obvious may be modified invarious ways without departing from the spirit and scope thereof.

What I claim is- 1. In a tool of the character described, a drivingpart, a driven part, a bearing to take the end thrust of one partagainst the other a cam-surface on one oi said parts, a clutchrollerbetween said cam-surface and the adjacent surface of the other partwhereby when said parts are rotated in one direction relatively to eachother they will be interlocked by said -clutch-roller, and alongitudinallymovable manually-operated means to engage saidclutch-roller and block it out of its operative clutching position.

2. In a tool of the character described. a driving part, a driven part,an end bearing therefor to take the thrust thereof a hub on the drivingpart, a surrounding wall on the driven part, a double cam-surface onsaid hub said cam-surfaces being oppositely inclined, a pair ofclutch-rolls, a single spring engaging both of said rolls for normallycausing said rolls to move away from each other and toward the higherparts of the cam-surfaces and longitudinally-movable blockingout devices.arranged to coact with said clutchrollers.

3. In a tool of the character described, a driving part, a driven part,a hub, a bearing to take the end thrust thereof a wall on the lattersurrounding said hub, two clutch-roll- .ers thereon and means to causeboth of said clutch -rollers to simultaneously engage the driving anddriven part to interlock the same and longitudinally-movable means toblock out either of said clutch-rolls and hold it out of its operativeclutching position.

4. In a tool of the character described, a driving part, a driven part,a cam-surface on one of said parts, a clutch-roller between saidcam-surface and the adjacent surface of the other part whereby when saidparts are rotated in one direction relatively to each other they will beinterlocked by said clutch-roller, and a longitudinally-movableblocking-out device arranged to coact with said roller andantifriction-balls arranged between the driving and driven member andarranged to take the end thrust of one` of said members against theother.

5. In a tool of the character described, a driving part, a driven part,a hub on the driving part, a surrounding wall on the driven part, adouble cam-surface on said hub said cam-surfaces being oppositelyinclined, a pair of clutch-rolls, a single spring for normally causingsaid rolls to move away from each other and toward the higher parts ofthe camsuri'aces and longitudinally-movable blockingout devices arrangedto coact with said clutchrollers, and antifriction-balls between thedriving and driven parts and at the end of the hub on the driving partand arranged to take the end thrust of said hub.

6. In a tool of the character described, a driving part, a driven part,a hub on the driving part, an end bearing to take the thrust of saidhub, a surrounding wall on the driven part, a double cam-surface on saidhub said cam-surfaces being oppositely inclined, a pair of clutch-rolls,a single expansion-spring for normally causing both of said rolls tomove away from each other and toward the higher parts of thecam-surfaces and longitudinallymovable blocking-out-devices arranged tocoact with said clutch-rollers.

7. In a tool of the character described, a driving part, a driven part,a hub, an end bearing, a Wall on the driven part surrounding said hub,two clutch-rollers and a single spring to cause both of saidclutch-rollers to simultaneously engage the driving and driven part tointerlock the same and longitudinallymovable blocking-outdevices todisplace either of said clutch-rolls and hold it out of its operativeclutching position, and a controllingsleeve coacting directly with saidblockingout devices.

Signed at New Britain, Connecticut, this 20th day of September, 1904.

HARRIS J. COOK. Witnesses:

H. S. WALTER, W. J. WORAM.

